Why Microsoft Exchange Accounts Are Breaking on macOS Mail – And How to Fix “Error 3”
Getting hit with “The operation couldn’t be completed. (com.apple.accounts error 3.)” on macOS Mail? You’re not alone. Thousands of Mac users are currently locked out of their Microsoft Exchange and M365 accounts due to a major protocol conflict between Apple and Microsoft. Before you spend hours resetting keychains or deleting local account databases, learn what’s actually causing this authentication glitch and discover the 4 simple workarounds to get your email back up and running today.